I think by naming him Pazuzu, you delt his fate.![]()
But seriously, I've had my experiences with snappy little BP's and it's something you have to work with. Some never come around, most grow out of it.
Be sure to keep them on a consistent feeding schedule and handle them on a regular basis. A hook works well to let them know that you are coming and obviously prevents bites.
However, your older one seems like that it's his nature and unfortunately never grow out of it.